MicroStation has started displaying pop ups about the software being idle and will be shutdown.
The variable will be still there but not defined by user (level undefined).
If MicroStation keeps displaying the pop up and shutdown please double check with your IT department to see if they are using any third party application to restrict licenses as described in this article:
Bentley Calendar Hour Control
or also any other third parties in this area:
Strategies For Limiting Usage
If this is the case please contact the third party company as their software has a setting to regulate or extend this idle time out if needed.
How to have MicroStation Automatically Shutdown idle time out